Katy Perry, Miley Cyrus, Lady Gaga, watch out ... Britney Spears is coming for you!

The pop diva has been prepping new music and released a few photos from the set of an upcoming music video.

"Hot day on set... A little dirty, little flirty, danced my ASS off. Stoked for tomorrow," she posted on Facebook ... while a tweet revealed her new single is called "Work Bitch."

With Britney sporting a black and yellow bustier, black gloves and some flawless hair and makeup, it looks like Spears could have a hot one on her hands.

The song is rumored to sample RuPaul's hit "Supermodel (You Better Work)" -- and its release just may be what the mysterious countdown clock on her website is actually counting down to.

She's also slated to appear on "Good Morning America" on September 17... and should also be announcing more information about her upcoming Las Vegas show.

On Sunday, Spears shared another pic -- showing her in a blue bikini and sky-high sparkly heels.

"Gonna get my tan on in the desert in between shots on the #WorkBitch set today. It's HOT out here people!!!! #desert #heatwave
," she posted on Facebook.

Are you ready for a full-on Britney invasion?!

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